Insulating Basement Walls


I have questions and concerns. I live in a 5 year old home in Canada and I am about to finish my basement. It is insulated and has a 6mil vapour barrier. I am concerned as I recently noticed that my builder only used 2x3 studs against my basement walls. The studs are an inch away from the wall, and then it is insulated with 2x3 batts of R12 insulation. I have been researching online what to do for the best insulation prior to finishing my basement. I have seen that it is a good idea to have vapour barrier behind the stud wall but I have also read bad things about this. Other sites have suggested getting spray foam. I had two estimators at my home. One suggested I get 2-3" spray foam and leave my 2x3, and throw out the batts and vapour barrier. Another estimator said I should get 2" spray foam (obviously only 1" behind the wall studs) and then reuse my batts and put a vapour barrier back on, after adding 2x2's to the existing 2x3's. Very expensive. Any ideas on what I should do? I want to make sure I am well insulated without spending a lot of wasted money on things I don't necessarily need. When I cut a whole in the vapour barrier I did have a bit of ice on the concrete wall, as is normal in Canada. But it is 1" away from the insulation which is good.  Not sure what method to choose?  What do do? Any suggestions?